Machine for manufacturing tank-bottoms



J. A. ANDERSON. MACHINE FOR MANUFACTURING TANK BOTTOMS.

' APPLICATION FILED JAN. II. I919.

. Patented July 29, 1919.

3 SHEETS-SHEET I.

N J. A. ANDERSON. MACHINE FOR MANUFACTURING TANK sonoms. APPLICATION FILED JAN. H, I919.- 1,31 1,306, Patented July 29, 1919.

3 SHEETS-SHEET 2.

J. A. ANDERSON. MACHINE FOR MANUFACTURING TANK BOTTOMS.

I APPLICATION FILED JAN. 11. I919- Patented July 29, 1919.

3 SHEETSSHEET 3.

MACHINE r03. MANUFACTURING TANK-BOTTOMS. 1 3

JERRY A. ANDERSON, F BATAVIA, ILLINOIS.

Application filed lanuary 11,1919.

To all whom it may concern:

Be it known that I, JERRY A. ANnnRson, a citizen of the United States, Batavia, in the .county of Kane and State of Illinois, have invented anew and useful Improvement in Machines for Manufactun ing TanlcBottoms, of which the following is a specification.

My invention relates in its preferred embodiment, tov improvements in machines for sawing and chamfering circular-tankbottoms; and my more particular objects, generally stated, are to provide a novel, simple, and readily operated machine for producing this work and which will operate to produce the chamfered edge on atankbottom of substantially uniform thickness throughoutthe circumference of the tankbottom and without splintering the wood being operatedlon. Referring to the accompanying drawlIlgS- Figure 1 1s a view in side elevation of the machine showing it inoperative positionon a blank from which a tank-bottom is tobe formed, a portion only of which is shown, for cutting atank-bot-tom therefrom. Fig. 2 is an enlarged view of. the machine taken from the left-hand side of Fig. 1. Fig. 3 is a plan section taken at the line 3 of; Fig. 1 and viewed in the direction of the arrow. Fig. 4 is a broken section taken at the line 4 on Fig. 3 and viewed in the direction. of the arrow. Fig. 5 is a broken view like Fig. 1, showing the machine equipped with devices for producing the chamfering of the tank-bottom after cutting it from a blank by the machine of Fig. 1, the machine being shown in operating position relative to a tank-bottom. Fig. 6 is a view in elevation of the machine of Fig. 5, viewing it from the left-hand side of this figure. Fig. 7 is a; plan view of the machine of Fig-.5 Fig. 8. is a section taken at the viewed-in the 1:2 is a section taken at the line 12 on Flg.

line 8 on Fig. {rand viewed in? the direction of the arrow.-- Fig. 9 is a; section taken at the line Q-on Fig, 8 direction of thearrow. Fig.10. is a section taken at the line 10.011- Fig. 5. and viewed in the direction, of the arrow. Fig. 11 is a section taken at; the line 11: on Fig. 7 and direction of the arrow.

and viewed in the direction of the arrow, this: section being through the chamfering Specification of Letters Patent.

residing at pivot pin being carnage 14.

shaft 22 and and viewed in the Patented July 29, 1919.

Serial No. 270,645.

device and Fig. 13, a plan view of the chamfering device. The machine as shown in Figs. 1 to 4, lnclusive, in which condition it is adapted for cutting a tank-bottom from a wood blank which, in accordance "with common practice, is made of planks secured together in edge to edge relation, comprises a carr age 14 surmounting the blank represented at 15, and formed with a section 16 adjustable lengthwise. along theicarriage at its slotted portion 17 which is engaged by a set-screw 14 on the carriage 14, its opposite end being equipped with a pivoting device 18 which may be fitted into any one o aseries of holes 19 in the section 16, this adapted to pivot in a socket 20 formed in the upper surface of the blank 15 substantially centrally of the latter, the outer end of the section 16 being guidingly confined in guides 14 on the The carriage 14 is connected with a spring device represented at 14 which also connects with the section 16 and operates to draw these parts together, the spring-proper 14 being adjustably connected at one end with the member 16 as at any one of the holes 19 and at its opposite end with a yoke-device 14"v connected with the carriage 14.

The carriage is preferably provided with rollers 21 at which it rests upon, and is movable along, the blank 15, and carries a shaft 22 journaled thereon in bearings 23 and 24, this shaft carrying a pulley 25 connected by a drive-belt 26 with a pulley 27 on a shaft 28 of a motor represented at 29'and rigidly secured to a frame 30 rising from the carriage, this part of the structure being equipped with a. handle device 31 by which the carriage may be swung around the pivot 18 as a center. The outer end of the shaft 22 carries a circular dished saw 32 rigidly secured; thereto as by clamping heads 32 and 312 the head 32 being rigid on the the head 32* being held in clamped condition against the saw by a nut 33.;screwing on the threaded outer end 34 of the shaft 22, this. saw being so positioned as to cut through the material of the blank 15' as shown in Fig. 1 and in the swinglng the nse of the machine for sawing as stated device 57 will extend the carriage 14 is adjusted lengthwise of the member 16 to the desired position and the clamping screw l4 tightened, the spring 14 not functioning in the sawing operation.

The machine in the other figures of the drawings is shown as adapted for the OllaIIl: fering of the underside of the circular tankbottom formed as stated and represented at 35. In this arrangement, the saw 32 and the clamping head 32 and nut 33 therefor are omitted and the threaded sleeve 36 is screwed on the threaded end 34 of the shaft 22 against the clamping-head 32 this sleeve having a reduced threaded shaft-extension '37 forming a shoulder 38. A head 39 fits over the shaft-extension 37 and against the shoulder 38 and screws into a threaded opening 40 in a depending plate 41 connected at its upper end with the depending portions of brackets 42 adjustably secured at their slotted portions 43, by set-screws 44, to the carriage. The outer end of the shaft extension 37 carries a. pulley 45 which, through the medium of the shaft 37, is driven from the motor 29.

The plate 41 carries a rock member 46 pivotally supported to rock on a horizontal axis, this rock u'iem'ber being formed of two lates 47 and 48 each of an le share in P e P cross-section which fit flatwise together at their sections 49 and 50, respectively, in which condition they are rigidly secured together as by bolts 51, the other angularlydisposed sections 52 and 53 of these plates extending generally in the same direction and in. spaced relation at which portions they straddle the peripheral edge of the tank-bottom to be chamfered as represented in Fig. 5. The upper section 52 carries a shoe device 54 adjustably connected therewith, as by the sets of carrying and adjusting screws 55 and 56, respectively, on this section, and adapted to bear against the upper surface of the tank-bottom as represented in Fig. 5 and travel along the same in the operation of the machine; and the section 53 has journaled therein a rotary chamfering device 57 which is adapted to chamfer the lower peripheral portion of the tank-bottom as represented at 58 (Fig. 5), the parts of the rock members 46 being so related as shown that when the parts are so adjusted that the shoe-device 54 and cutting device 57 engage the opposite faces of the tank-bottom, as shown, the cutting in a plane at an angle to that occupied by the tank-bottom to produce the bevel surface 58. His also preferred that the rock member 46 be provided with rollers 59 journaled on a flange 60 of the plate 50 to engage the circumferential edge of the tank-bottom, substantially in line with the pivots hereinafter described for the rock-member, so that these rollers will not interfere with the rocking of the ing a shaft 61 member 46 in the engagement of the shoedevice 54 with raised or depressed portions of the tank bottom.

The chamfering device may be of any desirable construction, that shown comprisjournaled in the plate-section 53 and carrying a cutter head 62 at its upper end and a pulley 63 secured thereto by a nut 64 and washer 65 and confined between the plate-section 53 and a strap-section 66 carried by the latter, with ball bearings c011- fined between these sections and the pulley 63 as'represented at 67 and 68. The cutter head is adapted to be-rapidly rotated by means of a belt 69 which passes over the pulley 45, thence across idle-pulleys 70 and 71 journaled on a bracket 72 secured'tothe plate 41 and around the pulley 63. The cut ter head as shown is formed across its up per face with a groo e 73 in which a cutterblade 74 is recessed as by set-screws 75, the

cutting edges 76 of the blade 74 bein sitely disposed at opposite sides of. the axis about which the head 57 rotates, as inclicated in the drawings, and the upper face of the head being recessed in advance of g PP these cuttin ed 'es as re Jresented at 77. 5 b

The rock-member 46 is pivotally support ed on the plate 41 as by the pivotpins 78 which are carried by clips 7 9 secured to opposite ends of the plate 41 and extend into sockets 80 in the ends of the rock-member 46 as represented in Fig. 10, the rock-member together with its pivoting means 79 be ing so arranged that the axis of the cutter member 57 extends within the circumference of the tank-bottom to be operated on as shown in Fig. 5 for a purpose hereinafter described.

In the use of the machine the shoe-device 54 is adjusted on the plate 52 to cause the cutter device 57 to be spaced from the shoedevice a sufficient distance to cause the cutter device to chamfer the lower edge of the tank-bottom to the desired thickness. The attachments shown in Figs. 5 to 13 inclusivefor performing the chamfering operation, are then applied to position as shown in these figures with the clamping device 14 loosened, and the carriage wardly againstthe resistance of the spring 14 to start the cutting of the underside of the tank-bottom by the chamfering element, the latter being rotated by the motor 29, the carriage feeding toward the pivot 18 by the action of the spring 14 augmented, or not, as desired, by the operator pushing it in, until the rollers 59 engage the outer circumference of the circular tank bottom. The machine is then swung around the tankbottom by rotating it at its pivotal connection 18 with the tank-bottom, the spring 14 holding the carriage at its rollers 59 in proper operating position at all times.

The sh0e-device 54 in the manipulation of 14 pulled out{ the machine, as stated,

travels along the up per surface of the tankbottom and in combination with the cutting device 57 held in fixed spaced relation to the shoe-device 54, insures the production of a circumferential chamfered edge of substantially uniform thickness regardless of raised or depressed portions in the upper surface of the tankbottom.

The feature of so arranging the parts of the structure as to cause the axis of the'cutting device 57 to extend within the circumference of the tank bottom is also of great advantage as thereby the action of the cutter device on the wood is such that splintering and chipping thereof is avoided as distinguished from the action which would take place were the axis of the cutter to extend beyond the circumference of the tank-bottom.

While I have illustrated and described a particular embodiment of my invention, I do not wish to be understood as intending to limit it thereto as the same may be variously modified and altered without departing from the spirit of my invention, it being my intention to claim my invention as fully and completely as the prior state of the art will permit.

lVhat I claim as new and desire to secure by Letters Patent is 1. Apparatus for chamfering circular bodies comprising a member movable around the periphery of the body to be chamfered and a rotatable chamfering element carried by said member and positioned to operate against the face of the body to be chamfered, with the axis of said chamfering element eX- tending within the circumference of the body being operated on.

2. Apparatus for chamferin circular bodies comprising a member having a pivot at which it engages the central portion'of the body to be chamfered, and a rotatable chamfering element carried by said member and positioned to operate against the face of the body to be ohamfered, with the axis of Copies of this patent may be obtained for said chamfering element extending within the circumference of the body being operated on.

3. Apparatus for chamfering circular bodies comprising a member movable around the periphery of the body to be chamfered, a rock-member on said first-named member, and a chamfering element carried by said rock-member and positioned to operate against the face of the body to be chamfered, said rock-member having a portion which engages the opposite face of the body being operated on, for the purpose set forth.

4. Apparatus for chamfering circular bodies comprising a member movable around the periphery of the body to be chamfered, a rock-member on said first-named member, and a chamfering element carried by said rock-member and positioned to operate against the face of the body to be chamfered, said rock-member having an adjustable portion which engages the opposite face of the body being operated on, for the purpose set forth.

5. Apparatus for chamfering circular bodies comprising a member movable around the periphery of the body to be chamfered, a rock-member on said first-named member, and a chamfering element carried by said rock-member and positioned to operate against the face of the body to be chamfered, said rock-member having a shoe-device which engages the opposite face of the body being operated on, for the purpose set forth.

6. Apparatus for chamferin bodies comprising a member having a pivot at which it engages the central portion of the body to be chamfered, a rock-member on said first-named member, and a chamfering element carried by said rock-member and positioned to operate against the face of the body to be chamfered, said rock-member having a portion which engages the opposite face of the body being operated on, for the purpose set forth.

JERRY A. ANDERSON.

five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

circular 

